This 18" x 48" Heavy-Duty Type 304 Stainless Steel Solid Metro Shelf feature black, powder-coated corners and are the best choice for storing large quantities or very heavy items due to their 1,000lb. per shelf capacity (evenly distributed). Metro HD shelves adjust on 2" increments and require the use of Metro HD Posts, and are not compatible with Metro Super Erecta or Super Adjustable posts.